| UTR Pro Tennis Series - Nis | 2021/10/04 10:00 | Ivan Liutarevich v Stefan Ivic | 6-4,6-0 |
| UTR Pro Tennis Series - Zadar | 2021/10/02 13:00 | Lawrence Bataljin v Ivan Liutarevich | 6-4,6-3 |
| UTR Pro Tennis Series - Zadar | 2021/09/30 12:00 | Ivan Liutarevich v Michalis Sakellaridis | 6-7,5-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/29 15:00 | Ivan Liutarevich v Deni Zmak | 4-6,6-4,6-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/28 11:00 | Ivan Liutarevich v Ivan Denisov | 3-6,2-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/27 11:00 | Ivan Liutarevich v Maxim Krapivin | 6-4,5-1 |
| ITF - M15 Ulcinj | 2021/09/22 12:00 | Ivan Liutarevich v Juan Pablo Paz | 3-6,0-6 |
| ITF - M15 Ulcinj | 2021/09/15 09:30 | Ivan Liutarevich v Alexis Musialek | 1-6,2-6 |
| UTR Pro Tennis Series - Nis | 2021/10/04 08:30 | Veljko Krstic v Oleksandr Bielinskyi | 5-7,6-1,6-3 |
| ITF - M15 Zlatibor | 2021/09/16 09:40 | Oleksandr Ovcharenko v Veljko Krstic | 6-1,6-1 |
| ITF - M15 Zlatibor | 2021/09/14 11:10 | Tomislav Jotovski v Veljko Krstic | 4-6,1-6 |
| ITF - M25 Belgrad | 2021/06/29 10:40 | Skander Mansouri v Veljko Krstic | 7-6,7-5 |